Combined circuit-breaker and transformer



Sept. 5, 1933. G. BAUM 7 1,925,861

COMBINED CIRCUIT BREAKER AND TRANSFORMER Original Filed July :51, 1928 Ill \All

' J INVENTOR BY% 4 lm ATTOR N E Y Patented Sept. 5, 1933 UNITED STATES PATENT OFFICE COMBINED CIRCUIT-BREAKER m 1 newsrooms Frank G. Baum, Berkeley; Calif; Esther F;

Born executrix said Frank deceased G. Baum,

4.- Claims;

The purpose of this invention is to simplify and.

reduce the expense and space requirements of practice transforming and switch mechanism;

in high tension circuits are immersed in oil con-=- tained in special tanks for the purpose. n tanks are of considerable size, the oil switch to being substantially as large as the transfer tanks by reason oi. the usual vertical error e ment of the switch elements with the terminal. bushings in the top of the tank. Also at least three high tension bushings are required for each transformer and switch set, one for the'transformer tank and. two for the switch tank. this invention 1 dispense with the requirement for the high tension or secondary heretofore used with the transformer tanls, and I dispense with one of the tanks In accordance with my invention I employ e. tank divided by apartition into two comnartments, each of which may be filled with oil transformer being located in one compartment and having a terminal connected to one or? t e contact elements of the switch which is loc in the other compartment. in case of a terminal transformer the switch will he a double switch. and both terminals of the transformer will be connected to a contact element olthe switch.

With tins arrangement the switch may he a horizontally opening switch located above the transformer and the single tank for the two mem-: bers need. be but slightly higher than the usual transformer tank. The single bushing in case a single terminal transformer, or the two heels ings in case of e. two terminal transformer, be oisposed horizontally in the side wall of the switch compartment, while the lead or leads from. the transfoer to the switch may pass the partition by means oi oll tight bushings. The partition will eficctlvely separate the two com r partinents so that there will be no transference of oil between them, and means will he provided to chain or renew the oil independently in the two compartments. M I shall now describe the illustrates embocli ments oi my invention and shall thereafter point out no; invention in claims. v

Flex. 1 is a vertical section of one embodiment of my invention;

Fig. 2 is alike view 02 another embodiment.

In the construction shown in Figure 1, the tank 1 which may be made of steel, is divided by thehorizontal partition 2 into a relatively large lower transformer compartment and a smaller upper switch compartment. The transformer 3 in the lower compartment has its core supported on the bottom of the tank and one terminal 4 of 3%. the secondary wlnclhmg 5 of the transformer is grounded to the while the other terminal 6 posses through a bushing 'l in the partition 2 into the Upper compartment. For clarity of illustration the winding of the transformer omitted in the The switch construction contained in the up per corny lament ls of a form which constitutes the snlojechrnatter of my cop-ending application, Serl l lo. 2959M, July 24, 1928. Qne oi. the m switch elements is a horizontally sliding; contact reel 8 which enters tl ugh and bears in an in sulating bushing 53 in the side-wall of the com oartnlent, and other cooperative element of the switch is c. rotative or swinging conductive real lo. to is ho a suitably int-.- evicted veltlcol roe ll, which hears in the o the and actuated from any suit stole th (not shownlexternel of the tank.

The re the i.

also he actuated in synchronism go memo-er to by any suitable re to The lead 6 of 'erminal is connected electrlcah -ve switch member 1o, while the l h connected to a line terminal. so

he filled after remov plu and lel, and they may be drainetl assets .5 1o. .ln'expanslon' space pronto i'or oil switch chamber, as by arching the o. 9% The com 111 shown. in Figure 2 differs from that alcove i so. ecl n that the trensiormer 3' we type. The two terminals 4* the secondary winding: 5 lead into the anther through bushings? anclare connectet two oppositely facing fixeol switch ele ments lrl it which are supported by instrlattes: upon the partition 2. Coacting withthc switch elements it anollo are two horizontal contact scale it and 8 bearing in Ice oo oscal 9 and 9' anti actuated oppo v sitels synchronism suitable actuating means 12 and F2. .The slicing contact rods 8 and (will be connected to the line termlnals..

it a obvious-that various modifications may wi h 1. m blah-tension circuits, 5 coipbmeqenm cult-breaker and transformer comprising an oil- 'containing tank divided by a horizontal partition into an upper and a lower compartment, a transformer in one compartment, 2, contact in the.

other compartment having electrical connection with one transformer terminal, a sliding contact rod in the said other compartment arranged to make and break contact with the said contact to connect and disconnect the high-tension circult to and from saidtransformer, respectively, and actuating means for the contact rod external of the tank.

2. For high-tension circuits, a combined circult-breaker and transformer comprising an oilcontaining tank divided by a horizontal partition into an upper and a lower compartment, a transformer in one compartment, a contact in the other compartment having electrical connection with one transformer terminal, an insulating bushing in the wall of the said other compartment, 2. contact rod slidable through said bush ing and adapted to make and break contact with said contact, and means external of the tank tor actuating said contact rod.

3. For high-tension circuits, 9. combined circuit-breaker and transformer comprising an oilcontaining tank divided by a horizontal partltion into a relatively large lower compartment and a smaller upper compartment, a transformer in the lower compartment, an insulating bushing in the side wall of the upper compartment, and

a switch in the upper compartment including a side wall 01 the upper compartment, a switch in the upper compartment including a contact rod slidable through the bushing and a cooperative contact having electrical connection with a transformer terminal and actuating means for the contact rod disposed within the bushing external of the tank.

Y FRANK G. BAUM. 

